<template>
  <div class="swiper-container" ref="mySwiper">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="(slider,index) in skuImageList" :key="slider.id">
        <img :src="slider.imgUrl" :class="{active:currentIndex===index}" @click="changeCurrentIndex(index)">
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>
  import Swiper from 'swiper'
  export default {
    name: "ImageList",
    props:['skuImageList'],
    data(){
       return{
          currentIndex:0,
       }
    },
    watch:{
        skuImageList(){
          // handler 方法执行表示 bannerList 数组已经有了数据 但不代表 v-for 已经循坏完毕了 
           this.$nextTick(()=>{  // nextTick 表示 v-for已经循坏完毕了
             var mySwiper = new Swiper(this.$refs.mySwiper,{
                //loop:true, // 是否循坏轮播
                navigation:{
                  nextEl: ".swiper-button-next",
                  prevEl: ".swiper-button-prev",
                },
                //显示几个图片设置 
                slidesPerView:3,
                // 轮播一次 滚动几个过去
                slidesPerGroup:1
             })
           })
       } 
    },
    methods:{
       changeCurrentIndex(index){
          this.currentIndex = index;
          this.$bus.$emit('getIndex',this.currentIndex)
       }
    }
  }
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        width: 100%;
        height: 100%;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;
        display: block;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }
        // &:hover {
        //   border: 2px solid #f60;
        //   padding: 1px;
        // }
      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>